Early 20th century - Bacon's County Map and Guide - Lincoln. The map is whole, there is crease line damage and a few tiny holes were the crease lines meet. The cover is worn, the county guide has been repaired and re affixed. The population numbers refer to the 1901 census so I estimate it's circa early 1900's.
All that being said the map is fairly clean and is a good example of a map and an interesting historical guide.